Tuning-hammer



(No Model.)

B. A. JGN-ES.

v TUNING HAMMER.

No. 245,382. Patented Aug. 9,1881.

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UNITED STATES PATENT OFFICE.

EDGAR A. JONES, OF STUBGIS, MICHIGAN, ASSIGNOR OF ONE-HALF TO WILLIAM B.THOMPSON, OF CHICAGO, ILLINOIS.

TUNING-HAMMER.

SPECIFICATION forming part of Letters Patent No. 245,382, dated August9, 1881.

Application filed December 28, 1880.

To all whom it may concern Be it known that I, E. A. JONES, of Sturgis,in the county of St. Joseph and State of Michigan, have invented anImprovement in Tuning- I-Iammers, of which the following is aspecification.

The nature of this invention relates to cer tain new and usefulimprovements in the construction of that class of devices employed forturning the tuning-pins of pianos and other similar instruments, andwhich are known in the trade as tuning-hammers.

The object of this invention is to produce a device the parts ofwhichare adjustable, so that the handle may be adjusted to such position asshall be the most convenient to the operator.

The invention consists in the peculiar construction, arrangement, andvarious combinations of the parts, all as more fully hereinafter setforth.

Figure 1 is a perspective view of my improved tuning-hammer. Fig. 2 is avertical longitudinal central section of the same.

In the accompanying drawings, which form a part of this specification, Arepresents the stem of the tuning-hammer, one end of which is extensiblyadjustable in the handle B, as in the ordinary manner. The outer end ofthe stem Ais enlarged at a b, and is bifurcated, as at 0. Through theouter enlargement, to, of the stem is formed a circular opening at righta11- gles to the plane of the bifurcation c.

G is a quadrant frame or plate, the rim of which is provided with aseries of perforations, d, and a triangular-shaped hole, 0, at its axis,which is coincident with the holes in the end of the stem when thequadrant is placed in the bifurcation of the stem.

D is a lever, properly fulcrumed upon the stem A, as shown, and to itsshorter arm is pivoted a pin, g, which passes down through properopenings in the enlargement b of the (No model.)

stem to engage with one of the series of holes, d, of the quadrant, aspring, E, being employed to compel such engagement, as shown.

F represents the head, in one end of which is formed the socket i, whilethe tang or stem of the head,in this instance, is triangular incrosssection, so as to fit snugly in the similarly-shaped opening 0 inthe quadrant, and in which it may be secured against accidentaldisplacement by a set-screw, 8.

By the use of a device constructed substantially as described theprocess of tuning is rendered much easier, quicker, and more perfect, asthe handle can readily be turned or adjusted to the position mostdesirable to the operator, no matter at what angle the head fits thepin, enabling him to exert the required force upon the pins from aboutthe same position of the handle, and rendering the result produced moreaccurate, lessening the danger of overstraining the wires of the piano,which often occurs in the use of the ordinary hammer, owing greatly tothe continued change of position in which the force is applied.

I am aware that tuning-instruments have been made withradially-adjustable handles, and therefore do not broadly claim suchinven tion.

What I claim as my invention is- 1. In a tuning-hammer, the forked stemA and head F, in combination with the quadrant 0, having perforations dfor receiving the pin 9 on the spring-pivoted lever D, substantially asand for the purpose described.

2. In a tuning-hammer, the stem A, springlever D, and pin g, incombination with the perforated quadrant 0, adjustable vertically on thehead F, substantially as described.

EDGAR A. JONES.

Witnesses:

Enwn. F. (JAsE, H. L. ANTHONY.

